Metadata: Identification_Information: Citation: Citation_Information: Originator: Jenna C. Hill Originator: Nora M. Nieminski Originator: SeanPaul M. La Selle Originator: Janet T. Watt Originator: Daniel S. Brothers Originator: Mary L. McGann Originator: Travis V. Alongi Originator: Gerry A. Hatcher Originator: Brandon M. Nasr Originator: Jennifer A. McKee Originator: Peter Dal Ferro Publication_Date: 20240327 Title: Multi-sensor core logger (MSCL) scans of sediment cores collected offshore southern Cascadia, during field activity 2019-643-FA Geospatial_Data_Presentation_Form: Comma Separated Value (CSV) tabular data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P1E8GDZH Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, California Publisher: U.S. Geological Survey Online_Linkage: https:// doi.org/10.5066/P1E8GDZH Larger_Work_Citation: Citation_Information: Originator: Jenna C. Hill Originator: Nora M. Nieminski Originator: SeanPaul M. La Selle Originator: Janet T. Watt Originator: Daniel S. Brothers Originator: Mary L. McGann Originator: Travis V. Alongi Originator: Gerry A. Hatcher Originator: Brandon M. Nasr Originator: Jennifer A. McKee Originator: Peter Dal Ferro Publication_Date: 2024 Title: Sediment core data from offshore southern Cascadia - USGS field activity 2019-643-FA Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P1E8GDZH Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Hill, J.C., Nieminski, N.M., La Selle, S.M., Watt, J.W., Brothers, D.S., McGann, M.L., Alongi, T.V., Hatcher, G.A., Nasr, B.M., McKee, J.A., and Dal Ferro, P., 2024, Sediment core data from offshore southern Cascadia during field activity 2019-643-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P1E8GDZH. Online_Linkage: https://doi.org/10.5066/P1E8GDZH Description: Abstract: This dataset includes multi-sensor core logger (MSCL) data of sediment cores collected in southern Cascadia (offshore northern California) aboard the M/V Bold Horizon in September-October 2019. Purpose: As part of a multi-year project focused on characterizing offshore marine geohazards (tsunamis, earthquakes, and landslides), the U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program is collaborating with the Bureau of Ocean Energy Management (BOEM) to conduct research offshore northern California. This region marks the southern extent of the Cascadia Subduction Zone, which is a major tectonic boundary that is prone to megathrust earthquakes and includes a BOEM offshore wind area of interest. To gain a better understanding of the geologic hazards of the region, improve risk assessments for local communities and critical infrastructure, and to provide data for future research on regional tectonic, sedimentary, and geomorphic evolution of coastal California, the USGS collected sediment cores to enable a detailed investigation of southern Cascadia’s geologic history and ongoing activity. Supplemental_Information: Additional information about the field activity from which these data were derived is available online at httpscmgds.marine.usgs.govfan_info.phpfan=2019-643-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20190927 Ending_Date: 20191010 Currentness_Reference: Ground conditions at time data were collected Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -125.25388 East_Bounding_Coordinate: -124.07787 North_Bounding_Coordinate: 41.76312 South_Bounding_Coordinate: 40.76312 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:524fc0f1-075b-4d87-bcd4-b30a4bdc7dcc Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: core analysis Theme_Keyword: ocean processes Theme_Keyword: sediment transport Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: substrate Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: sediment Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme_Keyword: Department of the Interior Theme_Keyword: DOI Theme_Keyword: field activity number 2019-643-FA Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Ocean Place_Keyword: State of California Place_Keyword: Humboldt County Place_Keyword: Eureka Access_Constraints: None Use_Constraints: USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: JPC30_mscl_preview.jpg Browse_Graphic_File_Description: Example from core JPC-30 of MSCL data plotted from .csv file. Browse_Graphic_File_Type: JPG Native_Data_Set_Environment: Data were obtained with a Geotek MSCL-S system. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Quality control of attribute accuracy was conducted during field data collection and processing workflows. Logical_Consistency_Report: No formal logical consistency tests were conducted. Completeness_Report: Magnetic susceptibility values (mag_sus) measured in section 5 of core JPC10 (in "2019_643_FA_JPC10.csv") were rounded to integer values during acquisition. Otherwise, the dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Positional_Accuracy: Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Core depth values are relative to the top of sediment in the uppermost core section. Coring-induced compaction, if any, was not determined. No formal vertical accuracy tests were conducted. Lineage: Process_Step: Process_Description: Cores were collected aboard MV Bold Horizon using a U.S. Geological Survey (USGS) jumbo piston corer (JPC) on cruise 2019-643-FA. The JPC system consisted of a 2500-lb head weight, 3.43-inch diameter barrel, and polybutyrate liner. The JPC trigger arm was set up to collect a trigger core (TC) associated with each JPC (if successful). Gravity cores (GC) were collected with the same JPC system in two localities. JPCs and GCs were extruded and sectioned at sea. The cores were then transported back to the USGS Pacific Coastal and Marine Science Center. Process_Date: 2019 Process_Step: Process_Description: Cores were segmented into 150 cm (or shorter) sections and split into "working" and "archive" halves in the USGS Pacific Coastal and Marine Science Center core lab. Sediment surfaces were cleaned and smoothed on the "working" halves of split cores. Multi-sensor core logger (MSCL) data were acquired on a Geotek MSCL-S system (www.geotek.co.uk/products/mscl-s/). Each core was scanned through the system and measured simultaneously for core thickness, p-wave amplitude, p-wave velocity, density, magnetic susceptibility, and acoustic impedance. Cores with multiple segments are composited into a single comma delimited text CSV file. Total depth in core, depth in an individual core segment, and core segment numbers are provided in the CSV files. File names correspond to the names of each core. For example, ‘2019_643_FA_GC19.tif’ corresponds to gravity core ‘GC19’. A list of MSCL CSV files is included in this data release in the 2019-643-FA_cores.csv file. Process_Date: 2020 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Core ID Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 71 Spatial_Reference_Information: Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Local surface Depth_Resolution: 1.0 Depth_Distance_Units: centimeters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2019-643-FA_core_mscl.zip Entity_Type_Definition: A zip file containing 71 comma delimited text files of multi-sensor core logger data. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: sb_depth_cm Attribute_Definition: Depth in full core of MSCL measurement (value represents the upper edge of a 1 cm interval). Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 719 Attribute_Units_of_Measure: centimeters Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: sect_num Attribute_Definition: Section number of core Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 5 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: sect_depth_cm Attribute_Definition: Depth in section of MSCL measurement (value represents the upper edge of a 1 cm interval). Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 153 Attribute_Units_of_Measure: centimeters Attribute: Attribute_Label: core_thick_cm Attribute_Definition: Approximate width of sediments in core (i.e. outside diameter of core liner minus 2x core liner wall thickness). No data values are left blank and represent intervals that extend beyond the ends of core sections or indicate poor contact between the transducers and the core liner. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7.7623 Range_Domain_Maximum: 9.9733 Attribute_Units_of_Measure: centimeters Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: pwave_amp_mv/v Attribute_Definition: P-wave amplitude of sediment in sample interval. RMS value of mV transmitted through core per voltage applied. No data values are left blank and represent intervals that extend beyond the ends of core sections. P-wave amplitudes equal to 0 indicate poor contact between the transducers and the core liner. The associated P-wave velocity values are recorded but can be inaccurate when the amplitude equals 0. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0000 Range_Domain_Maximum: 0.0189 Attribute_Units_of_Measure: mV/V (millivolts per volts applied) Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: pwave_vel_m/s Attribute_Definition: P-wave velocity of sediment in sample interval. No data values are left blank and represent intervals that extend beyond the ends of core sections. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 562.5021 Range_Domain_Maximum: 4245.6920 Attribute_Units_of_Measure: m/s (meters per second) Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: density Attribute_Definition: Density of sediment in sample interval. No data values are left blank and represent intervals that extend beyond the ends of core sections. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.006 Range_Domain_Maximum: 2.386 Attribute_Units_of_Measure: g/cc (grams per cubic centimeter) Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: mag_sus Attribute_Definition: Magnetic susceptibility of sediment in sample interval. No data values are left blank and represent intervals that extend beyond the ends of core sections. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -7.2061 Range_Domain_Maximum: 897.9225 Attribute_Units_of_Measure: SI units times 10^-5 Attribute_Measurement_Resolution: 0.0001 Attribute: Attribute_Label: impedance Attribute_Definition: Acoustic impedance of sediment in sample interval. No data values are left blank and represent intervals that extend beyond the ends of core sections. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.2217 Range_Domain_Maximum: 7697.6770 Attribute_Units_of_Measure: kg/(s*m^2) x 10^3 (kilograms per second meter squared times 10^-3) Attribute_Measurement_Resolution: 0.0001 Overview_Description: Entity_and_Attribute_Overview: The first line of each csv file is a header line. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - CMGDS Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 1-831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Resource_Description: MSCL CSV files are provided in a zip archive (2019-643-FA_cores_mscl.zip). Please contact the PCMSC Data Coordinator about availability. Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Version_Number: NA Format_Information_Content: Zip file contains MSCL data from cores in CSV format. File_Decompression_Technique: Zip files may be decompressed with any zip utility (for example , 7zip, WinZip, Archive Utility). Transfer_Size: 0.3971 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1E8GDZH Access_Instructions: Data can be downloaded using the Network_Resource_Name link and scrolling to 2019-643-FA_cores_mscl.zip in the Sampling Data section. Fees: None. Technical_Prerequisites: CSV files can be viewed with any standard table editing software (for example, excel, numbers). Metadata_Reference_Information: Metadata_Date: 20240327 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998